The San Bernardino County sheriff's detective killed by Christopher Dorner during Tuesday's firefight in the San Bernardino mountains has been identified by sources as Jeremiah MacKay, a Redlands resident and 1995 Rim of the World graduate. The Inland Empire Emerald Society, where MacKay was a sergeant-at-arms, confirmed the death on their Facebook page. A detective with the sheriff's office, MacKay joined the department in July 1998. He was also a field training officer with the department. MacKay, 35, was quoted as recently as Saturday to the Associated Press -- regarding the complexity of the manhunt for Dorner: "This one you just never know if the guy's going to pop out, or where he's going to pop out," he said. "We're hoping this comes to a close without more casualties. The best thing would be for him to give up."